[isabelle-dev] Isabelle website
gottfried.barrow at gmx.com
Mon Sep 30 16:12:14 CEST 2013
On 9/30/2013 6:10 AM, Makarius wrote:
> There could be some nice videos instead, but I still don't know how to
> produce them.
The most popular screen-capture software for instructional videos is
2) Docs: http://www.techsmith.com/tutorial-camtasia-8.html
3) Trial: http://www.techsmith.com/download/camtasia/
4) Search on "TechSmith Camtasia Studio dizel_ avaxhome" if you need
more than 30 days to decide whether it's the way you want to go.
The hard part is the learning curve for Camtasia, and creating your
standard 5 second lead-in for the videos. Other than that, it should be
easy, not that I've done it yet:
1) Make sure you get clean, hot audio from your microphone, but not
distorted. Recording at 44.1 mono at 128kbps mpg3 is good.
2) Capture to a wide-screen format like 800x450, 960x540, 1024x576, or
1280x720. Find a happy medium between clear video without bad
compression artifacts, and decent file size. Mpeg4 will give you good
quality for 1280x720 and only take 10 Mbytes/minute. Camtasia has it's
own encoders, and I don't know the settings yet that you need to get
good quality with reasonable file size.
3) Capture your video: record and talk while you're doing screen
capture, and hit the pause button if you need to think.
4) Edit the video: fade in with a 3-5 second lead-in with a professional
looking graphic, the title of your specific video, and an optional music
or sound effects clip.
5) Edit out long pauses and less desirable dialog, which is as simple as
dragging a vertical bar to the left.
6) Fade out at the end, or fade out with a graphic, or fade out with a
graphic and a music clip.
7) Render it to a good format like mpeg4 and put it up on Youtube.
HINT: There are codecs such as MP4 and H.264, and then there are codec
container files, like MP4 and AVI. It all gets confusing, and I only
know the minimum, but the MP4 codec can be contained in both a MP4 and
AVI file. An important thing I've learned is that you can't get much
better than MP4 at getting both good quality and small file size. Other
codecs, however, do get much worse. The licensing of MP4 prevents it
from being freely used in video software, so won't find much free
editing software that uses it.
EXAMPLE: Lead-in with graphic, music, and title, and then he just talks
with screen capture, with simple cut edits. The audio has too much room
reverb in it because his microphone is not close enough, but it's an
example of a site that is constantly putting out new videos, with the
main emphasis on instruction, rather than flashy video effects:
EXAMPLE: Lead-in with graphic, title, and no music, and then he just
talks with screen capture, with simple transitions for the cuts:
EXAMPLE: Camtasia tutorial with simple title lead-in, with transitions
for the cuts, but you don't really need the transistions
If you want to get fancy, you can add 3 seconds of sound effects and
some dramatic audio to your lead in:
Or you can search on the web for some free audio clips.
The examples are just to show that after you learn how to use the
software, you just talk while doing screen capture, and then you cut out
what you say that doesn't flow good. It's like with lots of software
applications, after your initial investment of time to get a template,
it can be less trouble to do it all yourself than to part of it
yourself, and have someone else do the rest.
The big differences between a reasonably-professional video and
total-amateur are good audio, good video quality, cutting out
undesirable dialog, a lead in, and a lead out. For instructional videos
about software, anything other than simple cut edits between the
beginning and end of the video is not necessary. You'd do fancier
effects and transitions if you found time and were inclined to do it.
The hard part is learning the software, creating your lead in, and
experimenting with codecs to get good video quality with reasonable file
size. Camtasia might make the codec part easy, but I don't know. If all
I was wanting to do is what I've explained, life would be easy.
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